Geological Bulletin, Volume 14University of Peshawar, 1981 - Geology |
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Page 48
... rhyolite . Few samples plot close to the boundary line of field No. 4 and 3b and are described as rhyodacites . Rhyolite A generalized stratigraphic sequence of volcanics in a section along the Gabral River between Bahan Khwar and Utror ...
... rhyolite . Few samples plot close to the boundary line of field No. 4 and 3b and are described as rhyodacites . Rhyolite A generalized stratigraphic sequence of volcanics in a section along the Gabral River between Bahan Khwar and Utror ...
Page 52
... rhyolite is restricted to the calc - alkali field , while dike rock rhyolites plot in high - K field . Cluster ... Rhyolite ( high - K ) O High - K dacite High - K andesite Andesite 1 ( Calc - alkali ) Low - K andesite 53 55 60 Dacite ...
... rhyolite is restricted to the calc - alkali field , while dike rock rhyolites plot in high - K field . Cluster ... Rhyolite ( high - K ) O High - K dacite High - K andesite Andesite 1 ( Calc - alkali ) Low - K andesite 53 55 60 Dacite ...
Page 53
... rhyolite from the main flows and high - K rhyolite from the dike rocks is no longer obvious in Fig . 7 . - - DISCUSSION The whole rock major element data on the T.T. index and SiO2 variation diagrams show smooth transition from andesite ...
... rhyolite from the main flows and high - K rhyolite from the dike rocks is no longer obvious in Fig . 7 . - - DISCUSSION The whole rock major element data on the T.T. index and SiO2 variation diagrams show smooth transition from andesite ...
Contents
Petrography of the Loe Shilman Carbonatite Complex Khyber Agency | 29 |
Major Elements Abundance in the Kalam Lavas | 45 |
Sections of the Wargal Limestone Western Salt Range Pakistan | 63 |
Copyright | |
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albite albite-carbonate albitites alkaline granites alkaline rocks almandine Amph amphibole andesite apatite associated band beds betafite biotite blueschists brown Bull calc-alkaline calcareous calcite carbonate carbonatite Chaudhry chlorite clinopyroxene complex contain country rocks Desio diorites dolerites dolomite epidote fault feldspar fine-grained Formation gabbroic rocks gabbros Geol Geology gneisses grains granitic belt granitic gneisses granitic rocks granodiorite graphitic schists Himalayas hornblende igneous Indus intrusions island arc Jurassic Kalam volcanic zone Karakoram KASC Kempe and Jan Khyber Agency Kohistan magmatic magnetite Mansehra margin Mauji metamict metamorphism metasediments mica microfacies minerals MODAL COMPOSITION muscovite northern occur outcrop Pakistan pegmatite Peshawar Plain petrography petrology plagioclase pluton Punjab Univ pyrite pyrochlore pyroxenites quartz quartzite range region Reshian rhyolite river samples sandstones schistosity schists sediments sequence shales Shangla Shilman Siwalik sphene subduction suggest Swat syenites Tahirkheli Tarbela tectonic ultramafic University of Peshawar veins Warsak